Improving the Performance of Practical Decoy-State Measurement-Device-Independent Quantum Key Distribution with Biased Basis Choice

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2018,（9）
• 页码范围: 331-336
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0253-6102/70/3/331

摘要

Statistical fluctuations are unavoidable in realistic quantum key distribution (QKD) due to finite-size effect.Based on the four-intensity proposal on measurement-device-independent QKD (MDI-QKD) in [Phys.Rev.A 93 (2016) 042324],we particularly analyze the scenario that only three intensities are used,namely a three-intensity decoy-state MDI-QKD with biased basis choice.After performing full parameter optimization method,simulations results demonstrate that this scenario can obtain distinct enhancement compared with the conventional unbiased three-intensity decoy-state method,e.g.Xu et al.'s [Phys.Rev.A 89 (2014) 052333].Furthermore,results also show that it works more effciently by using HSPS than using WCS at longer transmission distance.